Photo-film developing or changing box.



H. K. HENNIGH. PHOTO FILMDEVELOPING 0R CHANGING BOX.

APPLICATION FILED SEPT. 30,19I5- 1,207,036.

Patented Deo. 5, 1916.

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UNITED sTATEs PATENT oEFioE.

HENRY K. HENNIGH,

OE NEWCASTLE,

INDIANA.

PHOTO-FILM DEVELOPING OR CHANGING BOX.

`Developing or Changing Boxes, of which the following is a specification.

This invention relates to improvements in boxes for the changing and development of photographic films wherein the top, bottom and all four sides of the box are all made separable from each other to enable them to be separated in the knock-down form of the box, which is the form in which it is shipped and stored and is usually kept except when in use.

The object is to provide separable joints between said parts which will be proof against the passage of light therethrough, and which will be durable and also inexpensive to manufacture.

I accomplish the above, and other objects which will hereinafter appear, by the mechanism illustrated in the accompanying drawing, in which- Figure 1, is a perspective view of my invention in operative position. Fig. 2 is a top plan view of same with the screen for i the eyes of the operator in the flat or knockdown position of said screen. Fig. 3 is a vertical section on the line 3 3 of Fig. 2, with the eye-screen in position for use instead of knocked down, and Fig. a is a horizontal section on the line of Fig. 3 showing the corner slip-joints.

.Like characters of reference indicate like parts throughout the several views of the drawing.

TheA box is preferably formed out of sheet metal, such for example` as sheet iron or steel, which may be appropriately galvanized, painted, enameled or finished in any suitable manner. he bottom 5, of the box is formed out of single piece of metal with the four edges turned up to form a continuous flange 6. The sides of the box fit into this flange with a vertical packing-strip 7 between the flange and said sides and a horizontal packing 8 between the lower edges of the sides and said bottom 5. This packing will preferably be felt or other suitable material which will insure a joint impervious to the passage of all rays of light.

The four vertical sides 7, 8, 9 and 10, of the box are connected at the four corners by Speceaton of Letters Patent.

Application led September 3Q, 1915.

Patented Dec. 5, 1916.

Serial No. 53,368.

lock-joints which are made and broken by endwise sliding movements of the parts. .l he said corner joints are best illustrated 1n liig. .4- where it will be noted that the vertical edges of the sides 7 and 9 are bent back outwardly against said members, thence outwardly at right angles for a distance equal to the thickness of the members 8 and l0, thence outwardly again at right angles easy means for dismembering or uniting the four sides. The four sides after being assembled as described are setwithin the flanged inclosure of the bottoni 5, and will preferably be retained by fasteners 11, here shown two-leaf hinges, one leaf of which is j'iermanently secured to the flange 6 and the other to the corresponding side 7 or 9, but the pintle 12 of both hinges is removable for the separation of the hinge and separation of said sides from the bottom.

The sides 7 and 9 have hand-holes 13 for the introduction into the box of the operators hands, as shown in Fig. 1, and these are surrounded by flexible light-proof sleeves 14, 14, contracted at their outer ends by elastic draws 1.5, which stretch to let the hands and arms through and then contract the sleeves closely against the arms to exclude the light. The sleeves are made several inches long to make the exclusion of light more certain and also to afford freedom of movement of the arms in and outof the box required in the film developing or changing operations performed therein. The inner ends of the sleeves are fastened to the box by impingement between the latter and metal rings 16, the rings being secured by screws or bolts 17 to provide for easy removal in the repair of the sleeves.

The side l() is provided with a window 18 which is closed by a colored glass adapted to exclude all light-'rays liable to damage the film, and the four sides of the box, 7 8, 9 and 10, are covered by a lid or top 19, having a depending marginal flange 20 which receives the upper end of the box.

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Vertical packing-strips i" and horizontal ones S are used herein the same manner as described tor the packing to exclude light between the sides and the bottom of the box.

rlChe lid 19 has a sight-opening closed by a glass z2 et the same cha acter as that in the Window 18, and this sight-opening is screened on three sides by a folding screen comprising a middle member 23 which is hinged at one edge to the lid, close to the opening, and tivo side members 24 and 25 hinged to member 23. The screen as a Whole can be flattened out upon the lid 19, in the manner shown in Fig. 2, when the screen is not in use, but by raising the middle memner 23 to a substantially vertical position and then swinging the sides 24. and 25 into contact with the edges oi the glass in the adjacent Window, it is in position for use as shown in Fig. l. Pins 26 hold the sides 24 and 25 in operative position.

A shutter 27 is hinged inside ot the box opposite to, that is, under the sight-opening and glass 22, and is manipulated by the hands of the operator Within the box. The Window 18 has a curtain 30 fastened to the side 10.

ln the operation ot my device, the lid 19 is removed and the camera to be loaded or unloaded, together with the ilm-box to or from which the iilm is to be transferred, are placed Within and the iid i9 is replaced. Then the operator introduces his hands through the side openings and sleeves, opens the shutter 27 and removes the curtain 30. By the aid of he light entering through the Window 18 the operator can see through the sight opening to perform such operations as are required.

ldfhen not in use the box can be dismembered and the separate parts piled and nested together in small space.

While l have described my invention with more or less minutesness as regards details of construction and arrangement and as being embodied in certain precise forms, l do not desire to be limited thereto unduly or any more than is pointed out in the claims. @n the contrary, l contemplate all proper changes in form, construction, and arrangement, the omission of immaterial elements and the substitution of equivalents as circumstances may suggest or necessity render expedient.

l claiml. A film-box having sides, top and bottom all in separable members, means for making the joints between the members impervious to light, said box having a sight opening in the top and a window in one side both covered With suitably colored material, screen-holding means on opposite sides of the sight opening, a screen section hinged to the box close to an edge of the sight opening which is at right angles to those near Which the screen holding means are located, a pair of screen sections hinged to said first section and adapted to be held in operative position by said screen holding means, said box having hand-holes in tivo ot its sides which are at right angles to the one With the Window, and flexible light-prooiC sleeves surrounding the hand-holes and extending` externallv ot' the box to envelop the operators arms with a lighteexcluding fit.

2. A, film-box havingsides, top and bottom all in members Wnich are separable from each other, sliding loch joints connecting said side members with each other, formed by bending the vertical edges ot one member outwardly against itself, thence out at right angles, thence back at right angles and thence at right angles across the iirst bend, and by bending the vertical edge ot' the mating member at right angles to form a hook which is slid endwise into a hoolishaped bend ot the first member, said top and bottom members heffingv marginal flanges which telescopically receive said sides in the assembled condition ot the latter, packing means to exclude the passage of light through the joints between the sides and the top and bottom of the box, said box having a Window opening and a sight opening and means for permitting the introduction of the operators hands into the box Without admitting light.

3. it knock-down hlm-box having sides, top and bottom all in members which are separable from each other, means Jor admitting an operators hands to the interior of the box Withoutadmitting light, said box having a Window and a sight-oliening and a screen adapted to be raised around the sight opening While the box is in use and to be lowered flat against the top of the box at other times, said screen being in a plurality of sections hinged to each other, one of which sections is hinged to the box.

ln Witness whereof, l have hereunto set my hand and seal at Indianapolis, Indiana, this 13th day of September, A. D. one thousand nine hundred and fifteen.

HENRY K. HENNLTGH. [1.. s]

Witnesses:

F. W. Wortmann, L. B. "Wonmvnn Copies of this patent may be obtained for five cents each, by addressing the Gommissoner of Patents, Washington, I) C. 

